WO2014208001A1 - Embrayage électromagnétique - Google Patents

Embrayage électromagnétique Download PDF

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Publication number
WO2014208001A1
WO2014208001A1 PCT/JP2014/002815 JP2014002815W WO2014208001A1 WO 2014208001 A1 WO2014208001 A1 WO 2014208001A1 JP 2014002815 W JP2014002815 W JP 2014002815W WO 2014208001 A1 WO2014208001 A1 WO 2014208001A1
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WO
WIPO (PCT)
Prior art keywords
friction
outer ring
ring portion
electromagnetic clutch
magnetic
Prior art date
Application number
PCT/JP2014/002815
Other languages
English (en)
Japanese (ja)
Inventor
邦洋 角
和典 水鳥
田渕　泰生
Original Assignee
株式会社デンソー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Priority to CN201480036722.0A priority Critical patent/CN105358857A/zh
Priority to US14/900,565 priority patent/US20160153507A1/en
Priority to DE112014003016.3T priority patent/DE112014003016T5/de
Priority to KR1020157036773A priority patent/KR20160013195A/ko
Publication of WO2014208001A1 publication Critical patent/WO2014208001A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/10—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings
    • F16D27/108—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members
    • F16D27/112—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F16D48/064—Control of electrically or electromagnetically actuated clutches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/36—Pulleys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D2027/008—Details relating to the magnetic circuit, or to the shape of the clutch parts to achieve a certain magnetic path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/102—Actuator
    • F16D2500/1021—Electrical type
    • F16D2500/1022—Electromagnet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10443—Clutch type
    • F16D2500/1045—Friction clutch

Definitions

  • the invention disclosed herein relates to an electromagnetic clutch having an armature that is attracted to a friction part by an electromagnetic force generated by energizing an electromagnetic coil.
  • the electromagnetic clutch disclosed in Patent Document 1 is known.
  • the electromagnetic clutch of Patent Document 1 has a structure shown in FIG. 19 which will be described later as a comparative example.
  • This electromagnetic clutch has a disk-shaped magnetic metal plate punched out at the center.
  • the magnetic metal plate forms a cylindrical inner ring portion 5 protruding from the center portion.
  • the magnetic metal plate has a friction portion 7 forming a clutch portion on the surface thereof.
  • a plurality of arc-shaped holes 16a and 16b are punched in a part of the friction portion 7.
  • a pulley portion 3 composed of multiple V-grooves is formed on the outermost periphery of the magnetic metal plate by rolling.
  • An outer ring portion 8 made of a cylindrical magnetic annular member is coupled to the friction portion 7 so as to cover from the outside of the inner ring portion 5. This connection is provided by the plastic connection method.
  • the cylindrical outer ring portion 8 is press-fitted and fixed to a ring-shaped step portion 30 formed in the friction portion 7.
  • several grooves 31 such as a V-shape are formed near the press-fitting side end facing the step portion 30 of the outer ring portion 8.
  • Several grooves 31 of the outer ring portion 8 are press-fitted into the inner peripheral side of the stepped portion 30.
  • the outer peripheral side of the stepped portion 30 is pressed and plastically deformed radially inward of the stepped portion 30 with an annular die.
  • the stepped portion 30 is caused to flow into the above-mentioned several grooves 31, and the outer ring portion 8 and the friction portion 7 having the stepped portion 30 are plastically coupled.
  • electromagnetic clutches using this plastic coupling method have the following problems.
  • both members to be joined to each other are merely mechanically joined. Accordingly, a relatively large magnetic resistance exists between both members, leading to a decrease in performance as an electromagnetic clutch.
  • the invention disclosed herein has a low magnetic resistance of the magnetic circuit, improves the performance as an electromagnetic clutch, can suppress an increase in weight, and selects a member in consideration of a difference in linear expansion coefficient. It is an object to provide an electromagnetic clutch in which the degree of freedom is less limited.
  • One of the inventions disclosed herein is an electromagnetic clutch that transmits rotational force from one side member to the other side member by electromagnetic force, and has a cylindrical inner ring portion (5) that holds a bearing (4) on the inner periphery. ) And a friction part (7) having a friction surface (6) extending radially from the inner ring part (5).
  • a cylindrical outer ring portion (8) disposed around the inner ring portion (5) and joined to the friction portion (7) is formed integrally with the friction portion (7) or the outer ring portion (8).
  • a pulley portion (3) constituting one side member.
  • stator (11, 12, 15) including the electromagnetic coil (12) disposed between the outer periphery of the inner ring portion (5) and the inner periphery of the outer ring portion (8), and the electromagnetic coil (12) are generated.
  • the outer ring part (8) is joined to the friction part (7) by a joint part (9) formed by friction welding.
  • the outer ring portion (8) is joined to the friction portion (7) by the joint portion (9) formed by friction welding, so that the outer ring portion (8) is formed on the entire surface of the joint portion (9). ) And the friction part (7) are firmly bonded with each other. For this reason, a magnetic characteristic equivalent to the case where the outer ring portion (8) and the friction portion (7) are integrally formed is obtained. That is, the magnetic flux generated by the electromagnetic coil (12) flows from the outer ring portion (8) to the friction portion (7) with a small magnetic resistance. Thereby, it is small and the coupling force becomes strong, and the performance of the electromagnetic clutch is improved. And an increase in weight can be suppressed. In addition, since the joint portion (9) is firmly bonded to each other, the degree of freedom in selecting a member associated with considering the difference in linear expansion coefficient is rarely limited.
  • FIG. 1 is a longitudinal sectional view of an electromagnetic clutch according to a first embodiment of the invention. It is a longitudinal cross-sectional view which shows the rotor of the electromagnetic clutch of embodiment. It is the side view of the rotor seen from the arrow III direction of the rotor shown in FIG. It is process explanatory drawing which shows the shape before rolling of the magnetic metal plate in embodiment. It is process explanatory drawing which shows the cross-sectional shape of the magnetic metal plate after rolling in embodiment. It is process explanatory drawing which shows the state which formed the pulley part in embodiment. It is process explanatory drawing which shows the cylindrical outer ring
  • FIG. 3 is a friction welding explanatory diagram illustrating a state in which burrs are generated by applying a thrust after stopping rotation at the time of friction welding in the embodiment. It is a partial longitudinal cross-sectional view of the rotor which concerns on 2nd Embodiment of invention. It is a partial longitudinal cross-sectional view of the rotor which concerns on 3rd Embodiment of invention.
  • an inner ring portion for holding a bearing, a friction portion having a friction surface with an armature, and a pulley portion on which a belt is applied are provided by an integrally molded body.
  • This integrally molded body is formed by rolling.
  • An outer ring portion for constituting a magnetic circuit is friction-welded to the integrally formed body. By friction welding, the metals are firmly bonded to each other on the entire surface of the joint, so that magnetic characteristics equivalent to those in the integral molding can be obtained.
  • it demonstrates concretely based on drawing.
  • FIG. 1 shows an electromagnetic clutch 1 according to a first embodiment of the invention.
  • the electromagnetic clutch 1 is a device for driving a compressor (not shown) that compresses a refrigerant of a vehicle air conditioner. Specifically, by turning on and off the electromagnetic clutch 1, engine power is transmitted or not transmitted to the compressor.
  • the rotor 2 of the electromagnetic clutch 1 differs in the outer diameter and arrangement of the pulley portion 3 depending on the type of vehicle on which the electromagnetic clutch 1 is mounted.
  • the electromagnetic clutch 1 has an inner ring portion 5 for holding the bearing 4 and a friction portion 7 having a friction surface 6.
  • the inner ring portion 5, the friction portion 7, and the pulley portion 3 on which the belt is engaged are formed as an integral molded body.
  • the integrally molded body is indicated by reference numerals 5 and 7.
  • An outer ring portion 8 for magnetic circuit configuration is friction-welded to the integrally formed bodies 5 and 7. By this friction welding, the outer ring portion 8 and the friction portion 7 are coupled via the joint portion 9. Further, a gap 9g extending in the axial direction for accommodating the burr 22 is formed in a part of the outer corner of the electromagnetic coil 12 adjacent to the burr 22 so that the burr 22 formed by friction welding does not interfere with the electromagnetic coil 12. Is formed.
  • Friction welding itself is a well-known technique, and a processing device for friction welding is commercially available. Friction welding is also called friction welding, friction stir welding, or friction welding. This friction welding is a method of joining by applying high pressure by effectively using the energy of frictional heat generated by contacting and rotating metals together.
  • the metals are firmly bonded to each other on the entire surface of the joint 9, so that magnetic characteristics and strength equivalent to those obtained when the materials are continuously formed integrally are obtained.
  • the electromagnetic clutch 1 shown in FIG. 1 receives rotational power generated by an engine at a pulley unit 3 and transmits or shuts it to an armature 13 and a rotary hub 14 connected to a compressor for compressing refrigerant in a refrigeration cycle. It is.
  • FIG. 2 shows the structure of the rotor 2 of the electromagnetic clutch shown in FIG.
  • the electromagnetic clutch 1 has a stator 11 fixed to a compressor housing 10 indicated by a two-dot chain line, and an electromagnetic coil 12 accommodated in the stator 11.
  • the electromagnetic clutch 1 transmits an armature 13 attracted to the friction surface 6 of the friction portion 7 by the magnetic force generated by the electromagnetic coil 12 wound in a ring shape, and the rotational power of the armature 13 to the input shaft of the compressor.
  • a rotating hub 14 a rotating hub 14.
  • the stator 11 is an annular body made of a magnetic metal that accommodates the ring-shaped electromagnetic coil 12, and is fixed to the housing 10 of the compressor via a disk-like stay 14a.
  • the electromagnetic coil 12 is a magnet coil having an insulating film wound around a resin bobbin 15, mounted in the stator 11, and fixed in the stator 11 with an adhesive or the like.
  • the rotor 2 has an inner ring part 5, a friction part 7, a pulley part 3, and an outer ring part 8.
  • the rotor 2 is made of a magnetic metal, for example, made of steel with a small amount of carbon.
  • the rotor 2 has an annular body portion having a U-shaped cross section that is open on the opposite side to the armature 13 so as to accommodate the stator 11 of FIG.
  • the rotor 2 is rotatably supported by a compressor housing 10 through a bearing 4 attached to the inner periphery.
  • the inner periphery of the bearing 4 is supported by a compressor housing 10 indicated by a two-dot chain line.
  • the rotor 2 is formed by rolling a magnetic metal material such as soft iron. It has the inner ring part 5 used as the inner wall located in the inner peripheral side of the electromagnetic coil 12, and the outer ring part 8 used as the outer wall located in the outer peripheral side of the electromagnetic coil 12.
  • the rotor 2 has a friction portion 7 having a friction surface 6 (also referred to as a friction wall) that frictionally engages the armature 13.
  • the inner circumference of the inner ring portion 5 is cut so that the bearing 4 is mounted.
  • the pulley portion 3 is pressed from the outer peripheral side toward the inner periphery, and a plurality of belt grooves are formed on which a multistage V-belt (not shown) is stretched.
  • the friction part 7 forms a ring-shaped protrusion of magnetic material.
  • the friction part 7 has magnetic shielding parts 16a and 16b (collectively referred to as the magnetic shielding part 16) composed of arcuate holes or slits penetrating the front and back of the side surface.
  • the magnetic blocker 16 adjusts the flow of magnetic flux generated by the electromagnetic coil 12.
  • the magnetic shielding part 16 is made of a nonmagnetic metal material such as copper, in this embodiment, it is formed by an arcuate hole or a slit.
  • the magnetic interrupting part 16 prevents the magnetic flux ⁇ flowing from the inner ring part 5 to the armature 13 from being short-cut in the armature 13 and forming a magnetic path flowing to the outer ring part 8.
  • the magnetic flux ⁇ flows in the lower part of FIG. 1 as indicated by the broken line, and the armature 13 is attracted toward the friction surface 6.
  • a non-magnetic friction material 6 a that increases the engagement force with the armature 13 is fitted into the friction surface 6 on the left surface in FIG. 1 of the friction portion 7.
  • the armature 13 is disposed to face the friction surface 6 with a gap.
  • the armature 13 is supported so as to be movable in the axial direction, and can be engaged with the friction surface 6.
  • the armature 13 has a ring shape made of a magnetic material such as iron, and has a slit 17 that functions as a magnetic shielding portion in the middle.
  • the rotating hub 14 is rotated by the armature 13 in response to the rotation of the armature 13 and drives the input shaft of the compressor, and is fixed to the armature 13.
  • FIG. 3 shows the side surface of the rotor as seen from the direction of arrow III shown in FIG.
  • the inner ring part 5 and the outer ring part 8 are arranged concentrically.
  • the inner ring portion 5 and the outer ring portion 8 are connected to each other via a bridge portion 16a1 between the magnetic shielding portions 16a on the outer circumferential side and a bridge portion 16b1 between the magnetic shielding portions 16b on the inner circumferential side.
  • FIG. 4 shows a cross-sectional shape of the magnetic metal plate 20 before rolling.
  • a disk-shaped magnetic metal plate 20 with a punched center is prepared.
  • FIG. 5 shows a cross-sectional shape of the magnetic metal plate 20 after rolling.
  • Ring-shaped integrally molded bodies 5 and 7 having an L-shaped cross section including the inner ring portion 5, the friction portion 7, and the portion 3 p serving as the pulley portion are formed.
  • the integrally formed bodies 5 and 7 are formed by rolling, which is a plastic working method for forming a desired shape by applying a strong force to the metal material to flow the metal material. In the rolling process, the material is sandwiched between rolling dies, and the die is pressed toward the center of the material while rotating the material. By applying pressure beyond the yield point of the material, the material is plastically deformed and permanently deformed.
  • FIG. 6 shows a state in which the pulley portion 3 is formed.
  • the pulley portion 3 formed of multiple V grooves is formed by rolling on the outer surface of the portion 3p that becomes the pulley portion of FIG. Thereafter, the magnetic blocking portions 16a and 16b made of arcuate holes or slits are punched out by punching.
  • FIG. 7 shows a cross section of the upper half of the cylindrical outer ring portion 8.
  • the magnetic annular member shown in FIG. 7 is used as the outer ring portion 8 to pressurize the friction portions 7 of the integrally formed bodies 5 and 7 from the axial direction and rotate the outer ring portion 8.
  • the rotation of the outer ring portion 8 is given around the central axis of the outer ring portion 8 by a friction welding machine while gripping the outer periphery of the outer ring portion 8.
  • the size of the protrusion 21 is emphasized so that it can be easily understood.
  • the protrusions are hardly noticeable in the completed state of FIG. In FIG. 8, the friction part 7 side where the pulley part 3 is present is fixed, the outer ring part 8 is rotated, and a rotational difference is generated between the friction part 7 and the outer ring part 8 to generate frictional heat.
  • FIG. 9 illustrates a state in which the outer ring portion 8 is pressed against the friction portion 7 and a relative rotational difference is generated.
  • a projection 21 formed by a press having a height of about 1 mm is formed on a portion to be a joint portion of the friction portion 7.
  • FIG. 10 illustrates a state in which frictional heat is generated on the abutting surface where the two members to be frictionally joined are brought into contact with each other.
  • FIG. 11 illustrates a state in which the curl-like burrs 22 are generated by applying the upset thrust for a preset time after stopping the rotation.
  • molded by the press was provided in the part used as the junction part 9, this protrusion 21 may make it lose
  • the curled burr 22 may be formed also on the friction part 7 side.
  • a method for manufacturing the electromagnetic clutch 1 in which the armature 13 is attracted toward the magnetic metal friction portion 7 by the electromagnetic force generated by the electromagnetic coil 12.
  • the manufacturing method includes a step of forming a cylindrical outer ring portion 8 made of magnetic metal disposed adjacent to the electromagnetic coil 12 in order to provide a magnetic path through which the magnetic flux generated by the electromagnetic coil 12 passes.
  • this manufacturing method includes the step of bringing the outer ring portion 8 into contact with the friction portion 7 and moving the outer ring portion 8 and the friction portion 7 in a friction welding manner by relatively moving the outer ring portion 8 while pressing them against each other.
  • the process of friction welding is performed such that the material forming the outer ring portion 8 and the material forming the friction portion 7 are melted to form an integral joint portion 9.
  • the process of friction welding is performed so that the molten material generated between the outer ring portion 8 and the friction portion 7 extends radially inward and / or radially outward of the outer ring portion 8 to form a burr 22.
  • the process of friction welding involves relatively pressing the outer ring portion 8 and the friction portion 7 around the axis of the outer ring portion 8 while pressing the outer ring portion 8 and the friction portion 7 together along the axial direction of the outer ring portion 8. Performed by rotating.
  • the outer ring portion 8 is pressed onto an annular protrusion 21 provided in advance on the friction portion 7.
  • a step of cooling and hardening the molten material generated between the outer ring portion 8 and the friction portion 7 is provided.
  • the process of friction welding is performed so that the burr 22 does not come into contact with the stators 11, 12, and 15 including the electromagnetic coil 12.
  • the outer ring portion 8 and the friction portion 7 are formed of a surface-treated steel sheet having a surface treatment layer that is destroyed in the process of friction welding.
  • a process of forming an annular recess for forming a gap 9g for accommodating the burr 22 in the friction part 7, the outer ring part 8 or the stator can be included.
  • the following effects are exhibited.
  • the magnetic annular member constituting the outer ring portion 8 does not need rigidity, and can have a minimum thickness that satisfies the required magnetic performance, so that the weight can be reduced.
  • the outer ring portion 8 may have a simple annular shape (cylinder) and is inexpensive. (4) Since the metals are firmly bonded to each other by friction welding, a strength equivalent to that at the time of integral molding can be obtained.
  • the magnetic flux generated by the electromagnetic coil travels in the outer ring portion 8 in the axial direction, which is the left-right direction in FIG. Flowing into. For this reason, the magnetic path length becomes longer, and the magnetic resistance of the plastic coupling portion between the several grooves 31 and the step portion 30 becomes larger than that of the joint portion by friction welding.
  • both the magnetic member including at least the inner ring portion 5 and the friction portion 7 and the magnetic annular member including the outer ring portion 8 may be formed of a surface-treated steel plate.
  • the magnetic member including at least the inner ring portion 5 and the friction portion 7 and the magnetic annular member including the outer ring portion 8 are required to have corrosion resistance.
  • As a method of rust prevention treatment for obtaining corrosion resistance painting is mainly used.
  • impurities such as the surface treatment layer in the joint 9 are removed during friction welding. Therefore, it is possible to employ a surface-treated steel sheet by utilizing the removal of this impurity. Since the surface-treated layer of the surface-treated steel sheet is removed during friction welding, the magnetic resistance is not increased. Moreover, since the surface-treated steel sheet has a rust prevention effect on the member itself, the rust prevention treatment step such as painting can be omitted.
  • the electromagnetic clutch 1 transmits a rotational force from one side member to the other side member by electromagnetic force, and includes a cylindrical inner ring portion 5 that holds a bearing 4 on the inner periphery, and an inner ring portion 5. And a friction part 7 having a friction surface 6 extending in the radial direction. And a cylindrical outer ring portion 8 disposed around the inner ring portion 5 and joined to the friction portion 7, and a pulley portion 3 formed integrally with the friction portion 7 or the outer ring portion 8 and constituting one side member. Is provided.
  • an electromagnetic coil 12 disposed between the outer periphery of the inner ring portion 5 and the inner periphery of the outer ring portion 8, and an armature 13 that is attracted to the friction portion 7 by the electromagnetic force generated by the electromagnetic coil 12 and forms the other side member Is provided.
  • a joint portion 9 is joined between the outer ring portion 8 and the friction portion 7 by friction welding.
  • the outer ring portion 8 and the friction portion 7 have the joint portion 9 joined by friction welding, the outer ring portion 8 and the friction portion 7 are made of metal on the entire surface of the joint portion 9. Bond firmly together. For this reason, a magnetic characteristic equivalent to the case where the outer ring portion 8 and the friction portion 7 are integrally formed is obtained. That is, the magnetic flux generated by the electromagnetic coil 12 flows from the outer ring portion 8 to the friction portion 7 with a small magnetic resistance. Thereby, it is small and the coupling force becomes strong, and the performance of the electromagnetic clutch 1 is improved. In addition, the increase in weight can be suppressed, and the degree of freedom in selecting a member associated with considering the difference in coefficient of linear expansion is rarely limited. In addition, an increase in weight is suppressed accordingly.
  • the electromagnetic clutch 1 has burrs 22 formed by friction welding on the outer peripheral side and inner peripheral side of the joint 9. Therefore, the impurities on the friction joint surface are contained in the burrs 22 and removed from the joint 9, and the magnetic resistance of the magnetic flux flowing through the joint 9 can be reduced. Further, the burr 22 formed by friction bonding has a high strength and can be left as a product without any problem.
  • the electromagnetic clutch 1 has a ring-shaped projection 21 formed on the friction portion 7 side, and the outer ring portion 8 is brought into contact with the projection 21 and a joint portion 9 is formed in a ring shape along the projection 21 by friction welding. Yes. Therefore, by causing the outer ring portion 8 to contact the projection 21 and friction welding, the generated frictional heat can be concentrated on the projection 21 and easily friction-welded.
  • the electromagnetic clutch 1 has a pulley part 3, an inner ring part 5 and a friction part 7 as one body.
  • at least the inner ring portion 5 and the friction portion 7 are formed of integrally molded bodies 5 and 7 that are integrally formed of a magnetic member.
  • a magnetic annular member that forms at least the outer ring portion 8 is fixed to the integrally molded bodies 5 and 7 by the joint portion 9.
  • At least the inner ring portion 5 and the friction portion 7 are formed of the integrally formed bodies 5 and 7 that are integrally formed of a magnetic member, and at least the outer ring portion 8 is formed of a magnetic annular member.
  • the stator 11, the electromagnetic coil 12, and the bobbin 15 provide a stator in the electromagnetic clutch 1.
  • the armature 13 provides a mover in the electromagnetic clutch 1.
  • the stator defines a gap 9g that can receive the burr 22 so as to avoid interference between the burr 22 and the stator.
  • the gap 9g is provided by a chamfer formed at the corner of the stator 11.
  • the chamfered portion is formed to face a corner portion adjacent to the joint portion 9 between the friction portion 7 and the outer ring portion 8.
  • the chamfered portion is formed larger than the other chamfers provided in the stator 11 so that the burr 22 having a non-constant shape can be accommodated.
  • FIG. 12 shows the rotor 2 that is a part of the electromagnetic clutch according to the second embodiment of the invention.
  • the inner ring portion 5 for holding the bearing, the friction portion 7 having the friction surface 6 with the armature, and the pulley portion 3 on which the belt is applied are integrated into the integrally formed bodies 3, 5 and 7 (both the integrally formed bodies 5 and 7). Say) by rolling.
  • the first outer ring portion 8 a of the outer ring portion 8 (8 a, 8 b) is configured by an axially extending portion of the friction portion 7 toward the pulley portion 3.
  • the second outer ring portion 8b is formed by a short cylindrical portion 8b having a ring shape.
  • the joint portion 9 by friction welding is made between the first outer ring portion 8a and the second outer ring portion 8b that are the same body as the friction portion 7.
  • the thrust at the time of friction welding of the second outer ring portion 8b can be received by the first outer ring portion 8a which is the same body as the friction portion 7 extending in the axial direction.
  • the first outer ring portion 8a side is fixed, and the second outer ring portion 8b side rotates to generate a relative rotation difference.
  • a cylindrical inner ring that is an electromagnetic clutch that transmits a rotational force from one side member to the other side member by an electromagnetic force, and that holds the bearing 4 on the inner periphery.
  • a part 5 and a friction part 7 having a friction surface 6 extending in the radial direction from the inner ring part 5 are provided.
  • a cylindrical outer ring portion 8 (corresponding to the second outer ring portion 8b) which is disposed around the inner ring portion 5 and is joined to the friction portion 7, and one side member formed integrally with the friction portion 7
  • the pulley part 3 which comprises these.
  • an electromagnetic coil 12 (not shown in FIG. 12) disposed between the outer periphery of the inner ring part 5 and the inner periphery of the outer ring part 8 and the electromagnetic force generated by the electromagnetic coil 12 attracts the friction part 7.
  • an armature 13 forming the other side member.
  • a joint portion 9 is joined between the outer ring portion 8 (second outer ring portion 8b) and the friction portion 7 (first outer ring portion 8a that is the same body as the friction portion 7) by friction welding.
  • the outer ring portion 8 is divided into a first outer ring portion 8a and a second outer ring portion 8b that are the same body as the friction portion 7, and between the second outer ring portion 8b and the friction portion 7 and the first outer ring portion 8a that is the same body.
  • the outer ring portion 8 and the friction portion 7 have the joint portion 9 joined by friction welding, the outer ring portion 8 and the friction portion 7 are made of metal on the entire surface of the joint portion 9. Bond firmly together. For this reason, a magnetic characteristic equivalent to the case where the outer ring portion 8 and the friction portion 7 are integrally formed is obtained. That is, the magnetic flux generated by the electromagnetic coil 12 flows from the outer ring portion 8 to the friction portion 7 with a small magnetic resistance. Thereby, it is small and the coupling force becomes strong, and the performance of the electromagnetic clutch is improved. In addition, the increase in weight can be suppressed, and the degree of freedom in selecting a member associated with considering the difference in coefficient of linear expansion is rarely limited. In addition, an increase in weight is suppressed accordingly.
  • a ring-shaped protrusion 21 (similar to FIG. 6) may be formed on the friction portion 7 side that is the same body as the first outer ring portion 8a.
  • the second outer ring portion 8b may be brought into contact with the protrusion 21 and the ring-shaped joint portion 9 may be formed along the ring-shaped protrusion 21 by friction welding. In this way, by causing the outer ring portion 8 to come into contact with the projection 21 and friction welding, the generated frictional heat can be concentrated on the projection 21 and easily friction-welded.
  • the pulley portion 3, the inner ring portion 5, and the friction portion 7 are integrated.
  • at least the inner ring portion 5 and the friction portion 7 are formed of integrally molded bodies 5 and 7 that are integrally formed of a magnetic member.
  • a magnetic annular member (second outer ring portion 8 b) constituting at least the outer ring portion 8 is fixed to the integrally molded bodies 5 and 7 by the joint portion 9.
  • the thrust which becomes a rotation difference and a press-contact force relatively can be made to act between the two members of the integrally molded bodies 5 and 7 and the second outer ring portion 8b. Then, friction heat can be generated at the joint 9 located between the two members, and joining by friction welding can be easily performed.
  • FIG. 13 shows a part of an electromagnetic clutch according to a third embodiment of the invention.
  • the joint surface by friction welding is tapered. Since the joint surface by friction welding is tapered, the area of the joint portion 9 can be increased.
  • a cylindrical inner ring that is an electromagnetic clutch that transmits a rotational force from one side member to the other side member by electromagnetic force, and that holds the bearing 4 on the inner periphery.
  • a part 5 and a friction part 7 having a friction surface 6 extending in the radial direction from the inner ring part 5 are provided.
  • it includes a cylindrical outer ring portion 8 that is disposed around the inner ring portion 5 and joined to the friction portion 7, and a pulley portion 3 that is formed integrally with the friction portion 7 and forms one side member.
  • an electromagnetic coil 12 (not shown in FIG. 13) disposed between the outer periphery of the inner ring part 5 and the inner periphery of the outer ring part 8 and the electromagnetic force generated by the electromagnetic coil 12 attracts the friction part 7.
  • an armature 13 forming the other side member.
  • a joint portion 9 is joined between the outer ring portion 8 and the friction portion 7 by friction welding. In particular, it has the joint part 9 joined by friction welding between the outer ring part 8 and the inclined surface of the friction part 7.
  • the outer ring portion 8 and the friction portion 7 have the joint portion 9 joined by friction welding, the outer ring portion 8 and the friction portion 7 are made of metal on the entire surface of the joint portion 9. Bond firmly together. For this reason, a magnetic characteristic equivalent to the case where the outer ring portion 8 and the friction portion 7 are integrally formed is obtained. That is, the magnetic flux generated by the electromagnetic coil 12 flows from the outer ring portion 8 to the friction portion 7 with a small magnetic resistance. Thereby, it is small and the coupling force becomes strong, and the performance of the electromagnetic clutch is improved. In addition, the increase in weight can be suppressed, and the degree of freedom in selecting a member associated with considering the difference in coefficient of linear expansion is rarely limited. In addition, an increase in weight is suppressed accordingly.
  • a ring-shaped protrusion 21 may be formed on a part of the inclined surface of the friction portion 7.
  • the outer ring portion 8 may be brought into contact with the protrusion 21 and the ring-shaped joint portion 9 may be formed along the inclined ring-shaped protrusion 21 by friction welding. In this way, by causing the outer ring portion 8 to come into contact with the projection 21 and friction welding, the generated frictional heat can be concentrated on the projection 21 and easily friction-welded.
  • the pulley portion 3, the inner ring portion 5, and the friction portion 7 are integrated.
  • at least the inner ring portion 5 and the friction portion 7 are formed of integrally molded bodies 5 and 7 that are integrally formed of a magnetic member.
  • a magnetic annular member that forms at least the outer ring portion 8 is fixed to the integrally molded bodies 5 and 7 by the joint portion 9.
  • the thrust which becomes a rotation difference and a press-contact force relatively can be made to act between the two members of the integrally molded bodies 5 and 7 and the outer ring portion 8. Then, friction heat can be generated at the joint 9 located between the two members, and joining by friction welding can be easily performed.
  • FIG. 14 shows a metal ring constituting the outer ring portion 8 used in the electromagnetic clutch according to the fourth embodiment of the invention.
  • FIG. 15 shows the rotor of the electromagnetic clutch of the fourth embodiment as seen from the direction of arrow III in FIG.
  • the outer ring portion 8 is not a continuous annular member but a member formed by joining a band-shaped member into a ring having a C-shaped cross section. Since the belt-like members are rolled and joined, there is a cut 23. In this configuration, it is preferable that the members are formed in such a manner that the members are engaged with each other between the concave portion 24 and the convex portion 25 as shown in FIG. 14 because the rigidity of the outer ring portion 8 is improved.
  • the outer ring portion 8 can be configured by rounding the belt-shaped material.
  • the band-shaped material is cheaper than the continuous annular member, and the cost is reduced even if the molding cost is included.
  • FIG. 15 there is one cut 23 in the outer ring portion 8 formed by using a member obtained by forming a band-shaped member into a ring having a C-shaped cross section and joining it. Since the flow of the magnetic flux is perpendicular to the paper surface of FIG. 15, this break is unlikely to cause a decrease in performance.
  • wheel part 8 consists of a cross-sectional C-shaped formation body which rounded the strip
  • FIG. 16 shows a part of an electromagnetic clutch according to a fifth embodiment of the invention.
  • the burr 22 at the time of friction welding is arranged at a location that does not affect the arrangement of the stator 11, and the rotor is configured such that the step of removing the burr 22 can be omitted.
  • the thickness of the friction portion 7 is reduced in the stage from the inner ring portion 5 to the outer ring portion 8, and the space extending in the axial direction for accommodating the burr 22 in the plate thickness difference. It is set as the structure which secures. Thereby, the process of removing the burr 22 after the friction welding can be omitted.
  • a gap 9g extending in the axial direction for accommodating the burr 22 is formed in a portion adjacent to the burr 22 of the outer ring portion 8 so as to avoid interference between the burr 22 and the stator.
  • the gap 9g is provided by forming the friction portion 7 so as to increase the axial distance between the friction portion 7 and the stator. According to this, a sufficient gap 9g is formed between the burr 22 and the electromagnetic coil 12, and the burr 22 contacts the electromagnetic coil 12 so that the electromagnetic coil 12 is correctly positioned between the outer ring portion 8 and the inner ring portion 5. It is possible to avoid problems such as difficulty in storage.
  • FIG. 17 shows a partial longitudinal sectional view of an electromagnetic clutch according to a sixth embodiment of the invention.
  • the diameter of the outer ring portion 8 on the side of the joint portion 9 bulges partly to ensure a clearance 9g that allows the burr 22 to escape in the radial direction. Thereby, the process of removing the burr 22 after the friction welding can be omitted.
  • the portion adjacent to the burr 22 of the outer ring portion 8 bulges in the radial direction so as to avoid interference between the burr 22 and the stator.
  • the gap 9g is provided by forming the outer ring portion 8 so as to increase the radial distance between the joint portion 9 and the stator. According to this, a sufficient radial gap 9g is formed between the burr 22 and the electromagnetic coil 12, and the burr 22 contacts the electromagnetic coil 12 so that the electromagnetic coil 12 is between the outer ring portion 8 and the inner ring portion 5. It is possible to avoid problems such as difficulty in storing in the correct position.
  • FIG. 18 is a partial longitudinal sectional view of an electromagnetic clutch according to a seventh embodiment of the invention.
  • the inner ring portion 5 and the friction portion 7 are integrally formed as a magnetic member.
  • the outer ring portion 8 and the pulley portion 3 are formed into a magnetic annular member integrally formed, and both are joined by a joint portion 9 by friction welding.
  • the inner ring portion 5 side is fixed, and the outer ring portion 8 integrated with the pulley portion 3 is rotated by a friction welding machine to perform friction welding.
  • a friction welding machine to perform friction welding.
  • an electromagnetic clutch that transmits a rotational force from one side member to the other side member by an electromagnetic force
  • a cylindrical inner ring that holds the bearing 4 on the inner periphery.
  • a part 5 and a friction part 7 having a friction surface 6 extending in the radial direction from the inner ring part 5 are provided.
  • a cylindrical outer ring portion 8 disposed around the inner ring portion 5 and joined to the friction portion 7, and a pulley portion 3 formed integrally with the friction portion 7 or the outer ring portion 8 and constituting one side member. Is provided.
  • an electromagnetic coil 12 (similar to FIG. 1) disposed between the outer periphery of the inner ring portion 5 and the inner periphery of the outer ring portion 8 and the other side attracted to the friction portion 7 by the electromagnetic force generated by the electromagnetic coil 12 And an armature 13 forming a member.
  • a joint portion 9 is joined between the outer ring portion 8 and the friction portion 7 by friction welding.
  • the outer ring portion 8 is formed as the same body as the pulley portion 3, the friction portion 7 and the inner ring portion 5 are configured as the same body, and the bonded portion is bonded between the friction portion 7 and the outer ring portion 8 by friction welding.
  • the outer ring portion 8 and the friction portion 7 have the joint portion 9 joined by friction welding, the outer ring portion 8 and the friction portion 7 are made of metal on the entire surface of the joint portion 9. Bond firmly together. For this reason, a magnetic characteristic equivalent to the case where the outer ring portion 8 and the friction portion 7 are integrally formed is obtained. That is, the magnetic flux generated by the electromagnetic coil 12 flows from the outer ring portion 8 to the friction portion 7 with a small magnetic resistance. Thereby, it is small and the coupling force becomes strong, and the performance of the electromagnetic clutch is improved. In addition, the increase in weight can be suppressed, and the degree of freedom in selecting a member associated with considering the difference in coefficient of linear expansion is rarely limited. In addition, an increase in weight is suppressed accordingly.
  • a ring-shaped protrusion 21 (similar to FIG. 6) may be formed on the friction portion 7 side.
  • the joint portion 9 may be formed along the projection 21 by friction welding and causing the second outer ring portion 8b to contact the projection 21. In this way, by causing the outer ring portion 8 to come into contact with the projection 21 and friction welding, the generated frictional heat can be concentrated on the projection 21 and easily friction-welded.
  • the pulley portion 3 and the outer ring portion 8 are integrated, while the inner ring portion 5 and the friction portion 7 are integrated.
  • at least the inner ring portion 5 and the friction portion 7 are formed of integrally molded bodies 5 and 7 that are integrally formed of a magnetic member.
  • a magnetic annular member that forms at least the outer ring portion 8 is fixed to the integrally molded bodies 5 and 7 by the joint portion 9.
  • the thrust which becomes a rotation difference and a press-contact force relatively can be made to act between the two members of the integrally molded bodies 5 and 7 and the outer ring portion 8. Then, friction heat can be generated at the joint 9 located between the two members, and joining by friction welding can be easily performed.
  • non-magnetic material air in an arc-shaped hole or slit is shown.
  • other non-magnetic material such as copper or aluminum, or non-magnetic resin may be used depending on the application.
  • the electromagnetic clutch used for the compressor that compresses the refrigerant is shown as an example.
  • the invention is not limited to the electromagnetic clutch used in all vehicles that transmit and cut off power, such as a supercharger and an automatic transmission. It can be applied to electromagnetic clutches for general-purpose machines.
  • the integrally formed body including the inner ring portion 5 and the friction portion 7 and the magnetic annular member including the outer ring portion 8 may both be made of a surface-treated steel plate.
  • the rotor for an electromagnetic clutch as shown in FIG. 2 is required to have corrosion resistance.
  • painting is mainly used as a method for the antirust treatment.
  • the friction welding may be heated and then cooled in a vacuum or in an inert gas (for example, nitrogen gas) atmosphere.
  • an inert gas for example, nitrogen gas
  • an alternating magnetic field may be applied to the place where friction welding is performed, and friction welding may be performed while performing low-frequency induction heating.
  • the arc-shaped holes 16 a and 16 b are punched by a press and then friction bonded, but the arc-shaped holes 16 a and 16 b may be punched by a press after first being friction-bonded.
  • the friction bonding is performed without the arc-shaped holes 16a and 16b, high heat generated during the friction bonding is uniformly dissipated and local thermal strain is hardly generated.
  • the burrs generated by the frictional bonding are left as a product, but may be deleted by cutting or the like.
  • the burr portion on the side that interferes with the electromagnetic coil may be deleted.
  • the thickness of a member to which heat is transmitted may be adjusted, or grooves or holes may be formed.
  • the ring-shaped protrusion 21 (FIG. 6) of about 1 mm is provided, but this protrusion 21 is not essential.
  • a ring-shaped recess may be formed and friction bonded in the recess so that the burr is housed in the recess to prevent interference between the burr and the electromagnetic coil.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Pulleys (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Braking Arrangements (AREA)

Abstract

L'invention concerne un embrayage électromagnétique (1) comportant : une bague interne cylindrique (5), dont la circonférence interne contient un palier (4) ; et une section de frottement (7) possédant une surface de frottement (6) qui s'étend en sens radial à partir de la bague interne (5). L'embrayage électromagnétique (1) comporte une bague externe cylindrique (8), qui est disposée autour de la bague interne (5) et est jointe à la section de frottement (7), et une section de poulie (3) qui est formée en une seule pièce avec la section de frottement (7) ou la bague externe (8). Une section de raccordement (9) permettant de raccorder la bague externe (8) à la section de frottement (7) est ménagée entre la bague externe (8) et la section de frottement (7). La section de raccordement (9) est formée par soudure par friction. Il arrive qu'une bavure (22), qui est formée par la soudure par friction, fasse saillie sur la circonférence externe ou la circonférence interne de la section de raccordement (9). La section de raccordement (9) offre d'excellentes caractéristiques magnétiques.
PCT/JP2014/002815 2013-06-26 2014-05-28 Embrayage électromagnétique WO2014208001A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201480036722.0A CN105358857A (zh) 2013-06-26 2014-05-28 电磁离合器
US14/900,565 US20160153507A1 (en) 2013-06-26 2014-05-28 Electromagnetic clutch
DE112014003016.3T DE112014003016T5 (de) 2013-06-26 2014-05-28 Elektromagnetische Kupplung
KR1020157036773A KR20160013195A (ko) 2013-06-26 2014-05-28 전자 클러치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013134025A JP2015010620A (ja) 2013-06-26 2013-06-26 電磁クラッチ
JP2013-134025 2013-06-26

Publications (1)

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WO2014208001A1 true WO2014208001A1 (fr) 2014-12-31

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JP (1) JP2015010620A (fr)
KR (1) KR20160013195A (fr)
CN (1) CN105358857A (fr)
DE (1) DE112014003016T5 (fr)
WO (1) WO2014208001A1 (fr)

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DE112017005920A5 (de) * 2016-11-23 2019-09-05 Schaeffler Technologies AG & Co. KG Drehmomentübertragungseinrichtung und Verfahren zur Herstellung einer Drehmomentübertragungseinrichtung
KR102170130B1 (ko) * 2017-08-02 2020-10-27 한온시스템 주식회사 클러치 및 이를 포함하는 압축기
US10883552B2 (en) * 2019-04-10 2021-01-05 Warner Electric Technology Llc Rotational coupling device with flux conducting bearing shield

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JPS4713544U (fr) * 1971-03-17 1972-10-17
JPS58111434U (ja) * 1982-01-25 1983-07-29 三菱電機株式会社 電磁連結装置
JPS6159028A (ja) * 1984-08-30 1986-03-26 Mitsubishi Electric Corp 電磁クラツチのロ−タの製造方法
JPS6216836U (fr) * 1985-07-16 1987-01-31
JPS6240335U (fr) * 1985-08-30 1987-03-10
JPS62177928U (fr) * 1986-04-30 1987-11-12
JPS63297827A (ja) * 1987-05-29 1988-12-05 Hitachi Ltd 電磁クラツチ
JP2001173442A (ja) * 1999-12-17 2001-06-26 Aichi Mach Ind Co Ltd 排気マニホールド
JP2006104503A (ja) * 2004-10-01 2006-04-20 Ntn Corp プレスプーリ
JP2011002098A (ja) * 2010-09-21 2011-01-06 Nsk Ltd プーリ軸受ユニット

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JPS62158226U (fr) * 1986-03-28 1987-10-07
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JPH0357526U (fr) * 1989-10-12 1991-06-03
JP2932217B2 (ja) * 1991-03-20 1999-08-09 小倉クラッチ株式会社 電磁クラッチ
US5642797A (en) * 1996-02-08 1997-07-01 Dana Corporation Molded plastic rotor assembly for electromagnetic friction clutch
EP0957278A4 (fr) * 1997-12-01 2000-10-25 Toyoda Automatic Loom Works Mecanisme de transmission d'alimentation
FR2818340B1 (fr) * 2000-12-20 2006-01-21 Denso Corp Embrayage electromagnetique
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Publication number Priority date Publication date Assignee Title
JPS4713544U (fr) * 1971-03-17 1972-10-17
JPS58111434U (ja) * 1982-01-25 1983-07-29 三菱電機株式会社 電磁連結装置
JPS6159028A (ja) * 1984-08-30 1986-03-26 Mitsubishi Electric Corp 電磁クラツチのロ−タの製造方法
JPS6216836U (fr) * 1985-07-16 1987-01-31
JPS6240335U (fr) * 1985-08-30 1987-03-10
JPS62177928U (fr) * 1986-04-30 1987-11-12
JPS63297827A (ja) * 1987-05-29 1988-12-05 Hitachi Ltd 電磁クラツチ
JP2001173442A (ja) * 1999-12-17 2001-06-26 Aichi Mach Ind Co Ltd 排気マニホールド
JP2006104503A (ja) * 2004-10-01 2006-04-20 Ntn Corp プレスプーリ
JP2011002098A (ja) * 2010-09-21 2011-01-06 Nsk Ltd プーリ軸受ユニット

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CN105358857A (zh) 2016-02-24
DE112014003016T5 (de) 2016-03-10
JP2015010620A (ja) 2015-01-19
US20160153507A1 (en) 2016-06-02

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